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v3.20.4

Intangible Assets (Details) - CAD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Impairment loss | $ 70 |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  | $ 318 | $ 373 |
Ending balance |  | 313 | 318 | $ 373
Gross carrying amount |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  | 788 | 807 |
Additions |  | 14 | 14 |
Acquisition |  | 37 | 16 |
Disposals (Note 4(R)) |  |  | (38) |
Change in foreign exchange rates |  | (2) | (6) |
Transfers |  | (3) | 0 |
Disposals |  | (1) |  |
Ending balance |  | 833 | 788 | 807
Gross carrying amount | IFRS 16 |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  |  | 5 |
Ending balance |  |  |  | 5
Accumulated amortization |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  | (470) | (434) |
Disposals (Note 4(R)) |  |  | 10 |
Change in foreign exchange rates |  |  | (1) |
Transfers |  | 0 | 0 |
Disposals |  | 1 |  |
Amortization |  | 51 | 50 |
Ending balance |  | (520) | (470) | (434)
Accumulated amortization | IFRS 16 |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  |  | (3) |
Ending balance |  |  |  | (3)
Coal rights |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  | 32 | 68 |
Ending balance |  | 24 | 32 | 68
Coal rights | Gross carrying amount |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  | 149 | 185 |
Additions |  | 0 | 0 |
Acquisition |  | 0 | 0 |
Disposals (Note 4(R)) |  |  | (37) |
Change in foreign exchange rates |  | 0 | 0 |
Transfers |  | 0 | 1 |
Disposals |  | 0 |  |
Ending balance |  | 149 | 149 | 185
Coal rights | Gross carrying amount | IFRS 16 |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  |  | 0 |
Ending balance |  |  |  | 0
Coal rights | Accumulated amortization |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  | (117) | (117) |
Disposals (Note 4(R)) |  |  | 9 |
Change in foreign exchange rates |  |  | 0 |
Transfers |  | 0 | 1 |
Disposals |  | 0 |  |
Amortization |  | 8 | 8 |
Ending balance |  | (125) | (117) | (117)
Coal rights | Accumulated amortization | IFRS 16 |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  |  | 0 |
Ending balance |  |  |  | 0
Software and other |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  | 132 | 118 |
Ending balance |  | 140 | 132 | 118
Software and other | Gross carrying amount |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  | 378 | 339 |
Additions |  | 0 | 0 |
Acquisition |  | 0 | 1 |
Disposals (Note 4(R)) |  |  | (1) |
Change in foreign exchange rates |  | 0 | (4) |
Transfers |  | 35 | 48 |
Disposals |  | (1) |  |
Ending balance |  | 412 | 378 | 339
Software and other | Gross carrying amount | IFRS 16 |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  |  | 5 |
Ending balance |  |  |  | 5
Software and other | Accumulated amortization |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  | (246) | (221) |
Disposals (Note 4(R)) |  |  | 1 |
Change in foreign exchange rates |  |  | (1) |
Transfers |  | (1) | (1) |
Disposals |  | 1 |  |
Amortization |  | 28 | 31 |
Ending balance |  | (272) | (246) | (221)
Software and other | Accumulated amortization | IFRS 16 |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  |  | (3) |
Ending balance |  |  |  | (3)
Power sale contracts |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  | 143 | 141 |
Ending balance |  | 146 | 143 | 141
Power sale contracts | Gross carrying amount |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  | 250 | 237 |
Additions |  | 0 | 0 |
Acquisition |  | 37 | 0 |
Disposals (Note 4(R)) |  |  | 0 |
Change in foreign exchange rates |  | (2) | (1) |
Transfers |  | (16) | 14 |
Disposals |  | 0 |  |
Ending balance |  | 269 | 250 | 237
Power sale contracts | Gross carrying amount | IFRS 16 |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  |  | 0 |
Ending balance |  |  |  | 0
Power sale contracts | Accumulated amortization |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  | (107) | (96) |
Disposals (Note 4(R)) |  |  | 0 |
Change in foreign exchange rates |  |  | 0 |
Transfers |  | 1 | 0 |
Disposals |  | 0 |  |
Amortization |  | 15 | 11 |
Ending balance |  | (123) | (107) | (96)
Power sale contracts | Accumulated amortization | IFRS 16 |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  |  | 0 |
Ending balance |  |  |  | 0
Intangibles under development |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  | 11 | 46 |
Ending balance |  | 3 | 11 | 46
Intangibles under development | Gross carrying amount |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  | 11 | 46 |
Additions |  | 14 | 14 |
Acquisition |  | 0 | 15 |
Disposals (Note 4(R)) |  |  | 0 |
Change in foreign exchange rates |  | 0 | (1) |
Transfers |  | 22 | (63) |
Disposals |  | 0 |  |
Ending balance |  | 3 | 11 | 46
Intangibles under development | Gross carrying amount | IFRS 16 |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  |  | 0 |
Ending balance |  |  |  | 0
Intangibles under development | Accumulated amortization |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  | 0 | 0 |
Disposals (Note 4(R)) |  |  | 0 |
Change in foreign exchange rates |  |  | 0 |
Transfers |  | 0 | 0 |
Disposals |  | 0 |  |
Amortization |  | 0 | 0 |
Ending balance |  | $ 0 | 0 | 0
Intangibles under development | Accumulated amortization | IFRS 16 |  |  |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |  |  |
Beginning balance |  |  | $ 0 |
Ending balance |  |  |  | 0
Lakeswind |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Impairment loss |  |  |  | 12
Lakeswind | Intangible assets |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Impairment loss |  |  |  | $ 1

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